Title:
【発明の名称】電気通信システム
Document Type and Number:
Japanese Patent JP3172528
Kind Code:
B2
Abstract:
A communication procedure suitable for a cordless telephone system involves time division duplex radio communication between a handset 11 and a base station 3 using alternating bursts of transmission over a single radio channel. Once a radio link has been set up, initial transmissions carry a synchronisation logical channel S and a signalling logical channel D multiplexed together, but the link may switch to bursts carrying a communications logical channel B for the speech data and the signalling logical channel D. Burst synchronisation is achieved by the asynchronous detection of words in a synchronisation channel S. These words have bit patterns reducing the probability of incorrect asynchronous detection of them. If one part ceases to receive handset signals from the other, it transmits a special signal, informing the other part. This enables both parts to detect the failure of a link at substantially the same time, so that their actions to re-establish the link are synchronised.
Inventors:
Albrow, Richard
Burns, Nigel Evlard
Beesley, Graham Edgar
Kant, Chris
Crisp Marcolm
Dudek, Michael Tee
Goodings, Rupert
Odhams, David Crawford
Proctor, Peter Nicholas
Rogers, Ian
Burns, Nigel Evlard
Beesley, Graham Edgar
Kant, Chris
Crisp Marcolm
Dudek, Michael Tee
Goodings, Rupert
Odhams, David Crawford
Proctor, Peter Nicholas
Rogers, Ian
Application Number:
JP50267790A
Publication Date:
June 04, 2001
Filing Date:
January 26, 1990
Export Citation:
Assignee:
Kenwood Corporation
International Classes:
H04B7/26; H04J3/00; H04J3/12; H04J3/06; H04L5/16; H04L7/04; H04L7/08; H04M1/00; H04M1/02; H04M1/24; H04M1/72505; H04M1/733; H04W72/08; (IPC1-7): H04Q7/38; H04J3/12
Domestic Patent References:
| JP55120235A |
Attorney, Agent or Firm:
Masao Okabe (4 others)